1135640 has 64 divisors (see below), whose sum is σ = 2916000. Its totient is φ = 394240.

The previous prime is 1135633. The next prime is 1135643. The reversal of 1135640 is 465311.

1135640 = 66² + 67² + ... + 154².

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12716 + ... + 12804.

2^1135640 is an apocalyptic number.

1135640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1135640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1458000).

1135640 is an abundant number, since it is smaller than the sum of its proper divisors (1780360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1135640 is a wasteful number, since it uses less digits than its factorization.

1135640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1135640 is about 1065.6641121854. The cubic root of 1135640 is about 104.3310457115.

The spelling of 1135640 in words is "one million, one hundred thirty-five thousand, six hundred forty".